Home / 13,889.39-20,828.48-5,122.35

Finding the Fourth Proportional to 13,889.39, 20,828.48 and 5,122.35

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Solution

The fourth proportional to 13,889.39, 20,828.48 and 5,122.35 is: 7,681.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,889.39 : 20,828.48 = 5,122.35 : x
  2. Step 2: Convert to fraction form
    13,889.39/20,828.48 = 5,122.35/x
  3. Step 3: Cross multiply
    13,889.39x = 20,828.48 × 5,122.35
  4. Step 4: Simplify right side
    13,889.39x = 106,690,738.92
  5. Step 5: Solve for x
    x = 106,690,738.92/13,889.39
  6. Step 6: Final answer
    x = 7,681.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.